Added ESC key handling

1 files changed, 52 insertions, 39 deletions

diff --git a/progs/redbook/dof.c b/progs/redbook/dof.c
index 166ca9e62f8..6673dc2d54f 100644
--- a/progs/redbook/dof.c
+++ b/progs/redbook/dof.c
@@ -3,14 +3,14 @@
 
 /*
  * (c) Copyright 1993, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED 
- * Permission to use, copy, modify, and distribute this software for 
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
  * any purpose and without fee is hereby granted, provided that the above
  * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that 
+ * and this permission notice appear in supporting documentation, and that
  * the name of Silicon Graphics, Inc. not be used in advertising
  * or publicity pertaining to distribution of the software without specific,
- * written prior permission. 
+ * written prior permission.
  *
  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
@@ -24,8 +24,8 @@
  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- * 
- * US Government Users Restricted Rights 
+ *
+ * US Government Users Restricted Rights
  * Use, duplication, or disclosure by the Government is subject to
  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
@@ -55,35 +55,35 @@
 
 /*	accFrustum()
  *  The first 6 arguments are identical to the glFrustum() call.
- *  
- *  pixdx and pixdy are anti-alias jitter in pixels. 
+ *
+ *  pixdx and pixdy are anti-alias jitter in pixels.
  *  Set both equal to 0.0 for no anti-alias jitter.
- *  eyedx and eyedy are depth-of field jitter in pixels. 
+ *  eyedx and eyedy are depth-of field jitter in pixels.
  *  Set both equal to 0.0 for no depth of field effects.
  *
- *  focus is distance from eye to plane in focus. 
+ *  focus is distance from eye to plane in focus.
  *  focus must be greater than, but not equal to 0.0.
  *
- *  Note that accFrustum() calls glTranslatef().  You will 
- *  probably want to insure that your ModelView matrix has been 
+ *  Note that accFrustum() calls glTranslatef().  You will
+ *  probably want to insure that your ModelView matrix has been
  *  initialized to identity before calling accFrustum().
  */
-void accFrustum(GLdouble left, GLdouble right, GLdouble bottom, 
-    GLdouble top, GLdouble nnear, GLdouble ffar, GLdouble pixdx, 
+void accFrustum(GLdouble left, GLdouble right, GLdouble bottom,
+    GLdouble top, GLdouble nnear, GLdouble ffar, GLdouble pixdx,
     GLdouble pixdy, GLdouble eyedx, GLdouble eyedy, GLdouble focus)
 {
-    GLdouble xwsize, ywsize; 
+    GLdouble xwsize, ywsize;
     GLdouble dx, dy;
     GLint viewport[4];
 
     glGetIntegerv (GL_VIEWPORT, viewport);
-	
+
     xwsize = right - left;
     ywsize = top - bottom;
-	
+
     dx = -(pixdx*xwsize/(GLdouble) viewport[2] + eyedx*nnear/focus);
     dy = -(pixdy*ywsize/(GLdouble) viewport[3] + eyedy*nnear/focus);
-	
+
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     glFrustum (left + dx, right + dx, bottom + dy, top + dy, nnear, ffar);
@@ -93,20 +93,20 @@ void accFrustum(GLdouble left, GLdouble right, GLdouble bottom,
 }
 
 /*  accPerspective()
- * 
+ *
  *  The first 4 arguments are identical to the gluPerspective() call.
- *  pixdx and pixdy are anti-alias jitter in pixels. 
+ *  pixdx and pixdy are anti-alias jitter in pixels.
  *  Set both equal to 0.0 for no anti-alias jitter.
- *  eyedx and eyedy are depth-of field jitter in pixels. 
+ *  eyedx and eyedy are depth-of field jitter in pixels.
  *  Set both equal to 0.0 for no depth of field effects.
  *
- *  focus is distance from eye to plane in focus. 
+ *  focus is distance from eye to plane in focus.
  *  focus must be greater than, but not equal to 0.0.
  *
  *  Note that accPerspective() calls accFrustum().
  */
-void accPerspective(GLdouble fovy, GLdouble aspect, 
-    GLdouble nnear, GLdouble ffar, GLdouble pixdx, GLdouble pixdy, 
+void accPerspective(GLdouble fovy, GLdouble aspect,
+    GLdouble nnear, GLdouble ffar, GLdouble pixdx, GLdouble pixdy,
     GLdouble eyedx, GLdouble eyedy, GLdouble focus)
 {
     GLdouble fov2,left,right,bottom,top;
@@ -128,7 +128,7 @@ void myinit(void)
     GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
     GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
     GLfloat position[] = { 0.0, 3.0, 3.0, 0.0 };
-    
+
     GLfloat lmodel_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
     GLfloat local_view[] = { 0.0 };
 
@@ -138,7 +138,7 @@ void myinit(void)
     glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
     glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
     glLightfv(GL_LIGHT0, GL_POSITION, position);
-    
+
     glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
     glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);
 
@@ -155,18 +155,18 @@ void myinit(void)
     glClearAccum(0.0, 0.0, 0.0, 0.0);
 }
 
-void renderTeapot (GLfloat x, GLfloat y, GLfloat z, 
-    GLfloat ambr, GLfloat ambg, GLfloat ambb, 
-    GLfloat difr, GLfloat difg, GLfloat difb, 
+void renderTeapot (GLfloat x, GLfloat y, GLfloat z,
+    GLfloat ambr, GLfloat ambg, GLfloat ambb,
+    GLfloat difr, GLfloat difg, GLfloat difb,
     GLfloat specr, GLfloat specg, GLfloat specb, GLfloat shine)
 {
     float mat[4];
 
     glPushMatrix();
     glTranslatef (x, y, z);
-    mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;	
+    mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;
     glMaterialfv (GL_FRONT, GL_AMBIENT, mat);
-    mat[0] = difr; mat[1] = difg; mat[2] = difb;	
+    mat[0] = difr; mat[1] = difg; mat[2] = difb;
     glMaterialfv (GL_FRONT, GL_DIFFUSE, mat);
     mat[0] = specr; mat[1] = specg; mat[2] = specb;
     glMaterialfv (GL_FRONT, GL_SPECULAR, mat);
@@ -175,9 +175,9 @@ void renderTeapot (GLfloat x, GLfloat y, GLfloat z,
     glPopMatrix();
 }
 
-/*  display() draws 5 teapots into the accumulation buffer 
+/*  display() draws 5 teapots into the accumulation buffer
  *  several times; each time with a jittered perspective.
- *  The focal point is at z = 5.0, so the gold teapot will 
+ *  The focal point is at z = 5.0, so the gold teapot will
  *  stay in focus.  The amount of jitter is adjusted by the
  *  magnitude of the accPerspective() jitter; in this example, 0.33.
  *  In this example, the teapots are drawn 8 times.  See jitter.h
@@ -192,8 +192,8 @@ void display(void)
 
     for (jitter = 0; jitter < 8; jitter++) {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	accPerspective (45.0, 
-		(GLdouble) viewport[2]/(GLdouble) viewport[3], 
+	accPerspective (45.0,
+		(GLdouble) viewport[2]/(GLdouble) viewport[3],
 		1.0, 15.0, 0.0, 0.0,
 		0.33*j8[jitter].x, 0.33*j8[jitter].y, 5.0);
 /*	ruby, gold, silver, emerald, and cyan teapots	*/
@@ -203,9 +203,9 @@ void display(void)
 	    0.75164, 0.60648, 0.22648, 0.628281, 0.555802, 0.366065, 0.4);
 	renderTeapot (0.2, -0.5, -5.5, 0.19225, 0.19225, 0.19225,
 	    0.50754, 0.50754, 0.50754, 0.508273, 0.508273, 0.508273, 0.4);
-	renderTeapot (1.0, -0.5, -6.0, 0.0215, 0.1745, 0.0215, 
+	renderTeapot (1.0, -0.5, -6.0, 0.0215, 0.1745, 0.0215,
 	    0.07568, 0.61424, 0.07568, 0.633, 0.727811, 0.633, 0.6);
-	renderTeapot (1.8, -0.5, -6.5, 0.0, 0.1, 0.06, 0.0, 0.50980392, 
+	renderTeapot (1.8, -0.5, -6.5, 0.0, 0.1, 0.06, 0.0, 0.50980392,
 	    0.50980392, 0.50196078, 0.50196078, 0.50196078, .25);
 	glAccum (GL_ACCUM, 0.125);
     }
@@ -219,8 +219,21 @@ void myReshape(int w, int h)
     glViewport(0, 0, w, h);
 }
 
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
 /*  Main Loop
- *  Open window with initial window size, title bar, 
+ *  Open window with initial window size, title bar,
  *  RGBA display mode, depth buffer, and handle input events.
  */
 int main(int argc, char** argv)
@@ -232,7 +245,7 @@ int main(int argc, char** argv)
     myinit();
     glutReshapeFunc(myReshape);
     glutDisplayFunc(display);
+    glutKeyboardFunc(key);
     glutMainLoop();
     return 0;             /* ANSI C requires main to return int. */
 }
-